ソウルイ (Stigeoclonium sp.) カロチノイド ノ ギョルイ (ニシキゴイ) カロチノイド エノ テンイ

1. The carotenoids of fancy red carps (Cyprinus carpio Linne) have separated by absorption chromatography and further characterized by their absorption spectra and behavior on the column chromatography. In some cases melting points were measured and reactions for specific functional groups were performed. 2. The principal carotenoids of the integument were lutein, α-doradexanthin, astaxanthin, and β-doradexanthin and in the internal organs the existence of canthaxanthin, lutein, and zeaxanthin was confirmed. 3. The contents of the stomach of fancy red carps were examined and half-digested algae were found in them, the presence of chlorophylls was also confirmed. In the ponds where the carps were being raised, the algae, Stigeoclonium sp, was found. The carotenoids of the algae were separated and the presence of α-carotene, β-carotene, β-zeacarotene, echinenone, canthaxanthin, lutein, zeaxanthin, violaxanthin and neoxanthin was confirmed. The metabolic pathway from the plant carotenoid, into fish carotenoid, was proposed